.page-faq {
  --faq-rail-w: 264px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 56px;
  background:
    radial-gradient(880px 420px at 10% -12%, rgba(226, 118, 46, .24), transparent 62%),
    radial-gradient(700px 400px at 90% 4%, rgba(55, 242, 201, .13), transparent 60%),
    var(--ink-900);
  border-bottom: 1px solid var(--ink-600);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -70px;
  height: 130px;
  background: linear-gradient(90deg, transparent, rgba(226, 118, 46, .32), rgba(55, 242, 201, .26), transparent);
  filter: blur(30px);
  transform: rotate(-1.6deg);
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .breadcrumb-list li {
  display: inline-flex;
  align-items: center;
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--ink-600);
}

.page-faq .breadcrumb-list a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  color: var(--neon);
}

.page-faq .faq-title {
  margin: 14px 0 18px;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-lede {
  margin: 0 0 36px;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: 0;
  max-width: 700px;
  background: var(--ink-600);
  border: 1px solid var(--ink-600);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-faq .faq-fact {
  background: var(--ink-800);
  padding: 16px 18px;
}

.page-faq .faq-fact dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .faq-fact dd {
  margin: 8px 0 0;
  font-size: 26px;
  line-height: 1;
  color: var(--neon);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-hub {
  padding: 60px 0 76px;
  background: var(--ink-900);
}

.page-faq .faq-hub-head {
  display: grid;
  gap: 14px;
  margin-bottom: 36px;
}

.page-faq .faq-hub-head h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.8vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-hub-note {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 880px) {
  .page-faq .faq-hub-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: end;
    gap: 40px;
  }
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-stream {
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--hdr) + 22px);
  }
}

/* ---------- 症状索引 ---------- */
.page-faq .faq-rail {
  padding: 16px;
  background: var(--ink-800);
  border: 1px solid var(--ink-600);
  border-radius: var(--r-lg);
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-rail-list {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  background: rgba(34, 48, 79, .55);
  color: var(--bone);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.3;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  border-color: var(--neon);
  background: rgba(55, 242, 201, .1);
  color: var(--neon-soft);
  outline: none;
}

.page-faq .faq-rail-num {
  font-size: 12px;
  color: var(--brand-lift);
}

@media (max-width: 1023px) {
  .page-faq .faq-rail-list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }
}

/* ---------- 症状分组 ---------- */
.page-faq .faq-group {
  position: relative;
  padding: 42px 0 52px;
  scroll-margin-top: calc(var(--hdr) + 26px);
}

.page-faq .faq-group:not(:first-child)::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 2px;
  height: 1px;
  background: linear-gradient(90deg, var(--ink-600), rgba(34, 48, 79, .1) 88%);
  transform: rotate(-0.45deg);
  transform-origin: 0 50%;
}

.page-faq .faq-group-head {
  display: grid;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-group-num {
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink-600);
}

.page-faq .faq-group-head h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 35px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-group-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-faq .faq-group-head {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 22px;
  }
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-entries {
  display: grid;
  gap: 12px;
}

.page-faq .faq-q {
  background: var(--ink-800);
  border: 1px solid var(--ink-600);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-q[open] {
  border-color: rgba(55, 242, 201, .42);
}

.page-faq .faq-q-summary {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 18px 56px 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-q-summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q-summary::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--neon);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-q[open] .faq-q-summary::after {
  content: "−";
}

.page-faq .faq-q-title {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--bone);
}

.page-faq .faq-q-verdict {
  display: block;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--neon-soft);
}

.page-faq .faq-q-body {
  display: grid;
  gap: 14px;
  padding: 18px 20px 22px;
  border-top: 1px solid rgba(34, 48, 79, .9);
  animation: faq-body-in .24s var(--ease) both;
}

@keyframes faq-body-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

.page-faq .faq-line {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-line-label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-inline-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 242, 201, .45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--brand-lift);
  border-color: var(--brand-lift);
}

/* ---------- 处理步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  background: rgba(10, 16, 32, .62);
  border: 1px solid rgba(34, 48, 79, .95);
  border-radius: var(--r-md);
  font-size: 15px;
  line-height: 1.72;
  color: var(--bone);
}

.page-faq .faq-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  border-radius: var(--pill);
  background: rgba(55, 242, 201, .12);
  border: 1px solid rgba(55, 242, 201, .4);
  color: var(--neon);
}

/* ---------- 数据维度组的慢读排版 ---------- */
.page-faq .faq-group--read .faq-entries {
  max-width: 680px;
}

.page-faq .faq-group--read .faq-line,
.page-faq .faq-group--read .faq-steps li {
  font-family: var(--font-serif);
  font-size: 16.5px;
  line-height: 1.92;
  letter-spacing: .01em;
}

.page-faq .faq-group--read .faq-line-label,
.page-faq .faq-group--read .faq-step-num {
  font-family: var(--font-mono);
  letter-spacing: .12em;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
}

.page-faq .faq-figure .media-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--ink-600);
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption,
.page-faq .faq-diagram-frame figcaption {
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-figure figcaption {
  padding-left: 14px;
  border-left: 2px solid var(--ink-600);
}

@media (min-width: 900px) {
  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: center;
    gap: 28px;
  }

  .page-faq .faq-figure--tall {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  }
}

/* ---------- 维度示意图 ---------- */
.page-faq .faq-diagram-frame {
  margin: 28px 0 0;
  padding: 20px;
  max-width: 660px;
  background: rgba(19, 28, 51, .72);
  border: 1px solid var(--ink-600);
  border-radius: var(--r-lg);
}

.page-faq .faq-diagram {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .dgm-axis {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  fill: #9AA7BF;
}

.page-faq .dgm-hit {
  fill: #37F2C9;
}

.page-faq .dgm-ring {
  fill: none;
  stroke: #37F2C9;
  stroke-width: 2;
}

/* ---------- 联系引导带 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: 54px 0 60px;
  background: var(--brand);
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -220px;
  width: 470px;
  height: 470px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 158, 77, .95), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-help-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-help h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-faq .faq-help p {
  margin: 0 0 18px;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.76;
  color: #2B1A0B;
}

.page-faq .faq-help-list {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-help-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.68;
  color: #2B1A0B;
}

.page-faq .faq-help-list li::before {
  content: "—";
  font-family: var(--font-mono);
  color: rgba(10, 16, 32, .5);
}

.page-faq .faq-help-card {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 24px 22px;
  background: rgba(10, 16, 32, .94);
  border-radius: var(--r-xl);
}

.page-faq .faq-help-row {
  display: grid;
  gap: 3px;
}

.page-faq .faq-help-row dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-help-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--bone);
  word-break: break-word;
}

.page-faq .faq-help-link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--pill);
  background: var(--ink-900);
  color: var(--bone);
  text-decoration: none;
  font-size: 15px;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-help-link:hover,
.page-faq .faq-help-link:focus-visible {
  background: var(--ink-800);
  transform: translateY(-2px);
  outline: none;
}

@media (min-width: 900px) {
  .page-faq .faq-help-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
    align-items: center;
    gap: 52px;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}